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# Is a jiffy an actual unit of time? If so, what is the count of the unit?

Question #102023. Asked by JennaXbear. (Dec 30 08 9:19 PM)

guitargoddess

Informally, it is just an unspecified short period of time.

In electronics, the term means 1/60 or 1/50 of a second.

In computing, it is not an exact measure of time, but it is used to describe one tick of the system timer interrupt. Alternatively, it could be 1/250 of a second.

In physics, a jiffy is the time taken for light to travel to a specified distance, or the time it takes for light to travel one fermi making a jiffy 3 x 10 (to the -29th power)seconds.

http://en.wikipedia.org/wiki/Jiffy_(time)

 Dec 30 08, 9:27 PM
star_gazer

In electronics, a jiffy is the time between alternating current power cycles (1/60 or 1/50 of a second) — see alternating current.

http://en.wikipedia.org/wiki/Jiffy_(time)

 Dec 30 08, 9:28 PM
JennaXbear

Actualy It is 1/100ths of a second but guitargodess you were the closest.

http://www.amusingfacts.com/ContentChannels.php?action=show_member_post&ownerID=&post_id=4498

 Dec 30 08, 9:33 PM
zbeckabee

jiffy: n.
1. The duration of one tick of the system clock on your computer (see tick). Often one AC cycle time (1/60 second in the U.S. and Canada, 1/50 most other places), but more recently 1/100 sec has become common. “The swapper runs every 6 jiffies” means that the virtual memory management routine is executed once for every 6 ticks of the clock, or about ten times a second.

2. Confusingly, the term is sometimes also used for a 1-millisecond wall time interval.

3. Even more confusingly, physicists semi-jokingly use ‘jiffy’ to mean the time required for light to travel one foot in a vacuum, which turns out to be close to one nanosecond. Other physicists use the term for the quantum-nechanical lower bound on meaningful time lengths,

4. Indeterminate time from a few seconds to forever. “I'll do it in a jiffy” means certainly not now and possibly never. This is a bit contrary to the more widespread use of the word.

http://catb.org/~esr/jargon/html/J/jiffy.html

 Dec 30 08, 10:20 PM

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